cyanide inhibition occurres in both the oxidized and reduced state of 4-HBCR, in the reduced state 4-HBCR is reactivated by simple oxidation, in the oxidized state reactivation is only achieved in the presence of sulfide

4-Hydroxybenzoyl-CoA reductase (dehydroxylating) from the denitrifying bacterium Thauera aromatica - prosthetic groups, electron donor, and genes of a member of the molybdenum-flavin-iron-sulfur proteins

4-Hydroxybenzoyl coenzyme A reductase (dehydroxylating) is required for anaerobic degradation of 4-hydroxybenzoate by Rhodopseudomonas palustris and shares features with molybdenum-containing hydroxylases

Anaerobic degradation of 4-hydroxybenzoate: reductive dehydroxylation of 4-hydroxybenzoyl-CoA and ATP formation during 4-hydroxybenzoate decarboxylation by the phenol-metabolizing bacteria of a stable, strictly anaerobic consortium